TRIP700 STEEL – AUTOMOTIVE STEEL
TRIP700 STEEL – AUTOMOTIVE STEEL
TRIP700 steel is a high-strength, low-alloy transformation-induced plasticity (TRIP) steel, where “TRIP” refers to its ability to undergo phase transformation during deformation, enhancing its strength and ductility. Available in solid sheets or coils, TRIP700 is commonly used in the automotive industry for structural components, crash safety parts, and body panels.
Description
What is TRIP 700
TRIP700 steel is composed of 96% iron, with carbon (0.2%), manganese (1.6%), silicon (1.5%), and aluminum (0.05%). It comes in sheets or coils and is metallic grey. With a tensile strength of 700 MPa, it offers excellent ductility and energy absorption. Used mainly in automotive structural components, crash parts, and body panels, it is processed through hot and cold rolling and can be surface-treated for corrosion resistance. Further classifications include TRIP780 and TRIP800.Characteristics of TRIP 700
Chemical Compositions
| Element | Composition (%) |
|---|---|
| Carbon (C) | 0.15 – 0.25 |
| Manganese (Mn) | 1.4 – 2.0 |
| Silicon (Si) | ≤ 0.5 |
| Phosphorus (P) | ≤ 0.03 |
| Sulfur (S) | ≤ 0.025 |
| Chromium (Cr) | 0.3 – 0.6 |
| Nickel (Ni) | ≤ 0.3 |
| Molybdenum (Mo) | 0.05 – 0.2 |
| Copper (Cu) | ≤ 0.2 |
| Aluminum (Al) | 0.015 – 0.06 |
Physical Properties
| Property | Metric | Imperial |
|---|---|---|
| Density | 7.7 g/cm³ | 0.278 lb/in³ |
| Melting Point | 1420°C – 1490°C | 2588°F – 2714°F |
| Boiling Point | – | – |
| Thermal Conductivity | 20.0 W/m·K | 11.6 BTU·in/hr·ft²·°F |
| Electrical Conductivity | – | – |
| Specific Heat Capacity | 460 J/kg·K | 0.110 BTU/lb·°F |
| Thermal Expansion Coefficient | 11.4 x 10⁻⁶ /°C | 6.3 x 10⁻⁶ /°F |
| Electrical Resistivity | 0.55 x 10⁻⁶ Ω·m | 0.55 x 10⁻⁶ Ω·m |
Mechanical Properties
| Property | Value (Metric) | Value (Imperial) |
|---|---|---|
| Tensile Strength | 700 MPa | 101.5 ksi |
| Yield Strength | 450 MPa | 65.3 ksi |
| Elongation | 20% | 20% |
| Impact Toughness | 35 J | 25.8 ft-lb |
| Hardness (HV) | 220 | 220 |
| Fatigue Strength | 350 MPa | 50.8 ksi |
| Modulus of Elasticity | 210 GPa | 30.5 Msi |
| Brinell Hardness (HB) | 180-240 | 180-240 |
| Rockwell Hardness (HRC) | 20-25 | 20-25 |
Industries & Applications
| Application | Components |
|---|---|
| Automotive Industry | Frame rails, Rail reinforcements, Door intrusion beams, B-pillars |
| Aerospace Industry | Aircraft landing gear components, Structural support beams, Cargo bay floors, Engine mounts |
| Construction Industry | High-rise building support beams, Bridge cable anchors, Earthquake-resistant structural elements, Heavy machinery frames |
| Marine Industry | Ship hull reinforcements, Offshore platform support structures, Submarine pressure hulls, Propeller shafts |
| Railway Industry | Train undercarriage frames, Impact-resistant car bodies, Bogie frames, Coupling systems |
| Energy Industry | Wind turbine tower components, Oil rig structural supports, Pipeline reinforcements, Pressure vessel walls |
| Agricultural Machinery | Tractor frames, Combine harvester chassis, Plow blades, Heavy-duty trailer hitches |
| Sports Equipment | High-performance bicycle frames, Racing car roll cages, Ski bindings, Ice hockey stick blades |
Machining
Heat Treatment of TRIP700 Steel
TRIP700 steel undergoes specific heat treatments to achieve optimal properties. Annealing involves heating to 800-900°C and slow cooling to relieve stresses and improve ductility. Normalizing is done at 850-950°C with air cooling to refine grain structure and enhance toughness. Quenching is performed after heating to 900-950°C, followed by tempering at 200-300°C to adjust hardness and ductility.
Surface Finish of TRIP700 Steel
Surface finishes for TRIP700 steel include pickling and oiling for temporary corrosion protection, galvanizing for excellent corrosion resistance, painting for enhanced appearance and protection, and powder coating for a durable, corrosion-resistant finish. Custom grades can be produced upon request.
Custom grades can be produced upon request.
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